Someone asked about the Barlink dilution, the recently discovered gene that on top of a single creme gene can make a horse look like a double dilute creme (e.g. cremello). In brief, one copy (with no accompanying creme gene) dilutes the skin but not the coat and two copies moderately dilute the coat. It also enhances the effect of a single creme gene, if present. These guys can look like double dilutes, or like champagnes, but genotypically they are not so won’t reproduce like them. You can read a little about this at the champagne registry site, linked below:
Barlink info - scroll to NEWS heading
A little more info is linked from there in a word doc; I don’t know if this will work but I’ll try linking to the google html version of that document:
html version of Carolyn Shepard’s Barlink document, from google cache
The Barlink dilution traces to a Paint. Silver dapple can indeed make a bay look chestnut, or adding a creme gene look palomino (though the pics of those I’ve seen look like silver haired buckskins), but it’s pretty rare or nonexistant in most breeds. Neither are at all likely in these warmbloods, unless they’ve got some interesting backgrounds… But hey, who knows when the next funky color mutation will turn up? 
The new edition of Sponenberg’s Equine Color Genetics is finally out. Essential reading for anyone breeding for color. Also, there are numerous resources online (some previously linked) discussing color genetics. Though be warned, some of the color websites are more accurate than others. (and if anyone wants to see some really creative thoughts on what genetics can give you a rare color, check out some of the horses people advertise as “grullas”.)